/*
 * Copyright 2003-2006, 2009, 2017, 2020 United States Government, as represented
 * by the Administrator of the National Aeronautics and Space Administration.
 * All rights reserved.
 *
 * The NASAWorldWind/WebWorldWind platform is licensed under the Apache License,
 * Version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License
 * at http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed
 * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
 * CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 *
 * NASAWorldWind/WebWorldWind also contains the following 3rd party Open Source
 * software:
 *
 *    ES6-Promise – under MIT License
 *    libtess.js – SGI Free Software License B
 *    Proj4 – under MIT License
 *    JSZip – under MIT License
 *
 * A complete listing of 3rd Party software notices and licenses included in
 * WebWorldWind can be found in the WebWorldWind 3rd-party notices and licenses
 * PDF found in code  directory.
 */
/**
 * @exports EarthElevationModel
 */
define([
        '../globe/AsterV2ElevationCoverage',
        '../globe/ElevationModel',
        '../globe/GebcoElevationCoverage',
        '../globe/UsgsNedElevationCoverage',
        '../globe/UsgsNedHiElevationCoverage'
    ],
    function (AsterV2ElevationCoverage,
              ElevationModel,
              GebcoElevationCoverage,
              UsgsNedElevationCoverage,
              UsgsNedHiElevationCoverage) {
        "use strict";

        /**
         * Constructs an EarthElevationModel consisting of three elevation coverages GEBCO, Aster V2, and USGS NED.
         * @alias EarthElevationModel
         * @constructor
         */
        var EarthElevationModel = function () {
            ElevationModel.call(this);

            this.addCoverage(new GebcoElevationCoverage());
            this.addCoverage(new AsterV2ElevationCoverage());
            this.addCoverage(new UsgsNedElevationCoverage());
            this.addCoverage(new UsgsNedHiElevationCoverage());
        };

        EarthElevationModel.prototype = Object.create(ElevationModel.prototype);

        return EarthElevationModel;
    });